Debugger: fix Qt namespace detection for gdb 7.4.1-debian
Debugger: fix Qt namespace detection for gdb 7.4.1-debian

Change-Id: I379ff3dec051b22ffe313e6543020488550df97e
Reviewed-by: Christian Stenger <accbb51712d7b9c4fb108439d01e716148e5f9e6@digia.com>

amyvmiwei/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,kuba1/qtcreator,Distrotech/qtcreator,danimo/qt-creator,maui-packages/qt-creator,maui-packages/qt-creator,martyone/sailfish-qtcreator,maui-packages/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,danimo/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,kuba1/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,danimo/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,xianian/qt-creator,farseerri/git_code,kuba1/qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,Distrotech/qtcreator,AltarBeastiful/qt-creator,kuba1/qtcreator,danimo/qt-creator,kuba1/qtcreator,kuba1/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator